Run the CMake smoke test on Windows

This would have caught a recent regression.

Author: jakepetroules

.github/scripts/windows_pre_build.ps1

@@ -0,0 +1,40 @@
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the Swift open source project
+##
+## Copyright (c) 2025 Apple Inc. and the Swift project authors
+## Licensed under Apache License v2.0 with Runtime Library Exception
+##
+## See http://swift.org/LICENSE.txt for license information
+## See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+##
+##===----------------------------------------------------------------------===##
+
+param (
+    [switch]$SkipAndroid,
+    [switch]$InstallCMake
+)
+
+# winget isn't easily made available in containers, so use chocolatey
+Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
+
+if ($InstallCMake) {
+    choco install -y cmake --installargs 'ADD_CMAKE_TO_PATH=System' --apply-install-arguments-to-dependencies
+    choco install -y ninja
+
+    Import-Module $env:ChocolateyInstall\helpers\chocolateyProfile.psm1
+    refreshenv
+
+    # Let swiftc find the path to link.exe in the CMake smoke test
+    $env:Path += ";$(Split-Path -Path "$(& "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" "-latest" -products Microsoft.VisualStudio.Product.BuildTools -find VC\Tools\MSVC\*\bin\HostX64\x64\link.exe)" -Parent)"
+}
+
+if (-not $SkipAndroid) {
+    choco install android-ndk
+
+    Import-Module $env:ChocolateyInstall\helpers\chocolateyProfile.psm1
+    refreshenv
+
+    # Work around a bug in the package causing the env var to be set incorrectly
+    $env:ANDROID_NDK_ROOT = $env:ANDROID_NDK_ROOT.replace('-windows.zip','')
+}

.github/workflows/pull_request.yml

@@ -29,7 +29,10 @@ jobs:
       linux_pre_build_command: SKIP_ANDROID=1 INSTALL_CMAKE=1 ./.github/scripts/linux_pre_build.sh
       linux_build_command: 'swift package -Xbuild-tools-swiftc -DUSE_PROCESS_SPAWNING_WORKAROUND cmake-smoke-test --disable-sandbox --cmake-path `which cmake` --ninja-path `which ninja` --extra-cmake-arg -DCMAKE_C_COMPILER=`which clang` --extra-cmake-arg -DCMAKE_CXX_COMPILER=`which clang++` --extra-cmake-arg -DCMAKE_Swift_COMPILER=`which swiftc`'
       linux_swift_versions: '["nightly-main"]'
-      windows_swift_versions: '[]'
+      windows_pre_build_command: 'Invoke-Program .\.github\scripts\windows_pre_build.ps1 -SkipAndroid -InstallCMake'
+      windows_swift_versions: '["nightly-main"]'
+      windows_build_command: 'Invoke-Program swift package cmake-smoke-test --disable-sandbox --cmake-path (Get-Command cmake).Path --ninja-path (Get-Command ninja).Path --extra-cmake-arg "-DCMAKE_C_COMPILER=$((Get-Command clang).Path)" --extra-cmake-arg "-DCMAKE_CXX_COMPILER=$((Get-Command clang).Path)" --extra-cmake-arg "-DCMAKE_Swift_COMPILER=$((Get-Command swiftc).Path)" --extra-cmake-arg "-DCMAKE_STATIC_LIBRARY_PREFIX_Swift=lib" --extra-cmake-arg "-DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreadedDLL"'
+
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main